3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = '0048656c6c6f20576f726c64'; while($i=substr($s=substr($s,2),0,2))echo"&#x00$i;";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 6
Branch analysis from position: 6
2 jumps found. (Code = 44) Position 1 = 18, Position 2 = 2
Branch analysis from position: 18
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 2
2 jumps found. (Code = 44) Position 1 = 18, Position 2 = 2
Branch analysis from position: 18
Branch analysis from position: 2
filename:       /in/ZJobg
function name:  (null)
number of ops:  19
compiled vars:  !0 = $s, !1 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '0048656c6c6f20576f726c64'
    3     1      > JMP                                                      ->6
          2    >   ROPE_INIT                                     3  ~4      '%26%23x00'
          3        ROPE_ADD                                      1  ~4      ~4, !1
          4        ROPE_END                                      2  ~3      ~4, '%3B'
          5        ECHO                                                     ~3
          6    >   INIT_FCALL                                               'substr'
          7        INIT_FCALL                                               'substr'
          8        SEND_VAR                                                 !0
          9        SEND_VAL                                                 2
         10        DO_ICALL                                         $6      
         11        ASSIGN                                           ~7      !0, $6
         12        SEND_VAL                                                 ~7
         13        SEND_VAL                                                 0
         14        SEND_VAL                                                 2
         15        DO_ICALL                                         $8      
         16        ASSIGN                                           ~9      !1, $8
         17      > JMPNZ                                                    ~9, ->2
         18    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
173.54 ms | 1399 KiB | 15 Q